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Description: This is a very simple board that takes a 6-12V input voltage and outputs a selectable 5V or 3.3V regulated voltage. All headers are 0.1" pitch for simple insertion into a breadboard.

Input power can be supplied to either the DC barrel jack or the two pin header labeled + and -. Output power is supplied to the pins labeled GND and VCC. Board has both an On/Off switch and a voltage select switch (3.3V/5V).

The two sets of four GND and VCC holes are spaced such that when connected to our Basic Breadboard both power busses will be powered.

Note: Headers are not supplied. You will need to supply your own headers to connect this board to a breadboard. Check below for some breakaway header strips.

Dimensions: 2.15x0.65"


  • 6-12V input voltage via barrel jack or 2-pin header
  • 3.3V or 5V regulated output voltage
  • 800mA Operating Current
  • ON/OFF switch
  • Output voltage select switch
  • Power status LED
  • PTC fuse protected power
  • 5.5x2.1mm center positive barrel jack


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Customer Comments

  • ——————– Tech Support Tips/Troubleshooting/Common Issues ——————–

    Fritzing Part

    SparkFun’s GitHub Repository for the Fritzing parts does not include the Breadboard Power Supply Stick. However, it is already included in the included in the Fritzing library. You just need to search for the term “ Breadboard Power Supply Board SMD ” and it should be the first part that shows up. You might need to make sure that you have the latest Fritizing software version and part library downloaded from Fritzing [ ].

  • Can this provide power to charge a li-ion battery?

  • NewEgg has something similar for $3.20.

  • This is cool but I’d really like to see it with simultaneous dual voltage output. I often have breadboard projects where I have a 3.3v and a 5v rail at the same time.

  • 2 SMD switches - $2.00 or less 1 1206 SMD LED - $0.10 1 Voltage regulator - $2.00 or less PCB - $2.00 or less Others - $2.00 or less Total $5.10 … buy it with sparkfun’s logo $226 (Y)

  • Much the same as the breadboard power supply kit ( ), yes?

  • Awesome idea!

  • Current Rating? LM317 = 3A, 1N4001 = 1A, PTC = 0.5A? So, half an Amp?

Customer Reviews

4.3 out of 5

Based on 3 ratings:

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1 of 1 found this helpful:

Great little supply for breadboarding

Having a few of these lying around makes it easy to quickly try something or leave something with a supply handy.

2 of 2 found this helpful:


This wonderful little board let’s me choose 3.3V for a Particle board or 5V for an arduino and the extra header let’s me pull off the source 12V.

Very Handy

I have only recently begun working on electronics projects. This power supply works well for my needs. I mostly need 5 volts, for my breadboard for small projects.

I soldered four header pins into the board and that was that. I pushed into the breadboard easily. There is an on-off switch and a switch to go from 3 volts to 5 volts.

Works great. Very happy with it for the price.